## Xhumanity Reaches To New Heights After Enabling Bsc Staking And Farming

With the fast adoption of social media platforms and blockchain technology to promote social products and services, opportunities abound in the crypto ecosystem are certainly unlimited.

In a bid to offer better opportunities to crypto enthusiasts, the team at xHumanity is pleased to announce that new staking and BSC farming are ready and further process can be followed at https://app.xhumanity.org/

Furthermore, BEP20 XDNA deposit is also enabled at BitMart. For BSC farming, you can stake XDNA for up to 266% APY. And for staking, you can stake XDNA up to 149% APY.

BSC Airdrop

In order to celebrate the new additions, xHumanity is very happy to announce that we are going to do a Giveaway (Airdrop) Event starting from Monday, 3rd May, 2021 with a 5,000 USD reward pool.

xHumanity Vision

xHumanity is born with the hope for a better world. Based on blockchain technology, xHumanity is an application that supports community building and social cross-interaction in both online and offline environments and distribute equity rewards.

The mandate of xHumanity is to revolutionize the present-day social media landscape, by reinventing human values and algorithms to create a better and more transparent social community where each member would be able to vote in the direction of a project.

xHumanity looks to leverage the power of blockchain technology as it is a technology that looks set to have the potential of contributing to the evolution of the Next Generation Internet and a viable tool to achieving high levels of Distributed Trust seamlessly and unobtrusively.

xHumanity is an innovative blockchain project and a social community where users are empowered to leverage on the gains of social media marketing. Whether you are a new user or you have been on the xHumanity protocol for some time now, the project helps to interact with like-minded individuals, freely air your views, and network with celebrities.

xHumanity directly connects to centralized social networking platforms like Twitter, YouTube, Instagram, Facebook, and LinkedIn. Investors looking for where to earn a decent ROI can farm, lend, and stake their capital to earn xDNA tokens.

Website: https://xhumanity.org/

ETH Explorer: https://etherscan.io/token/0x8e57c27761EBBd…b92CeB51a358AbB
BSC Explorer: https://bscscan.com/token/0x80dba9c32b7ab54…5522e24c0ba4c24

## java – How can I determine a rectangle’s original height through its part’s height’s?

First of all I would like to apologize If this is not the correct place to post this question, please let me know If I should post it somewhere else.

Lets suppose we have a rectangle, with W width and unkown height. This rectangle has been split into N smaller rectangles, all with known widths and heights. How can I create an algorithm that determines the original rectangle’s height, without having to determine the original position of every piece?

I’ve been thinking about this for a long time and haven’t been able to get an algorithm that works every time. My best try so far is to combine all rectangles with the same lengths and widths until I have only 1 left but this does not work every time.

## set theory – Heights of well-founded parts of models of \$mathsf{ZFC}\$

Work in the theory $$mathsf{ZFC}$$ + “Every set is contained in some transitive model of $$mathsf{ZFC}$$.”
My question is the following: which ordinals are the heights of the well-founded parts of models of $$mathsf{ZFC}$$?

For what follows, let $$mathsf{wfh}(M)$$ denote the height of the well-founded part of $$M$$.

In the countable case, the answer is simple: a countable ordinal $$alpha>omega$$ is the height of the well-founded part of a (necessarily countable) model of $$mathsf{ZFC}$$ iff $$alpha$$ is admissible. The left-to-right direction holds since the well-founded part of any admissibile set is itself admissible; the interesting direction is right-to-left, where Barwise compactness comes into play.

In the uncountable case the left-to-right direction of the argument above still works, but the right-to-left direction breaks since we lose Barwise compactness. In fact, it’s consistent with $$mathsf{ZFC}$$ that there are admissible ordinals which are not of the form $$mathsf{wfh}(M)$$ for any $$Mmodelsmathsf{ZFC}$$:

Suppose $$Mmodelsmathsf{ZFC}$$ and $$mathsf{wfh}(M)=omega_1^L$$. Then we have (via mild abuse) that $$L_{omega_1^L}subseteq M$$. Since $$L_{omega_1^L}$$ is locally countable, this means that $$omega_1^M$$ must be ill-founded. Picking some ill-founded $$M$$-ordinal $$alpha, we get in $$M$$ a bijection $$alpharightarrowomega$$ – which restricts externally to an injection $$omega_1^Lrightarrowomega$$. So we must have $$omega_1^L.

More generally, whenever $$kappa$$ is an infinite cardinal such that $$kappa^+=(kappa^+)^L$$ we get that $$kappa^+not=mathsf{wfh}(M)$$ for all $$Mmodelsmathsf{ZFC}$$ – just run the argument above with $$kappa^+$$ in place of $$omega_1$$ and “locally size-$$lekappa$$” in place of “locally countable.” But this doesn’t give a $$mathsf{ZFC}$$ result since it’s consistent that $$L$$ never computes successor cardinals correctly. So it’s not even obvious to me that $$mathsf{ZFC}$$ disproves “The possible values of $$mathsf{wfh}(M)$$ are exactly the admissible ordinals.” In particular note that it is consistent that $$omega_1$$ is the height of the well-founded part of a model of $$mathsf{ZFC}$$, since in fact it’s consistent that $$L_{omega_1}modelsmathsf{ZFC}$$ outright.

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## c++ – How to have `QTreeWidgetItems` of different heights in a `QTreeWidget` utilizing `QStyledItemDelegate`?

`QTreeWidget` has a protected method called `itemFromIndex()` and this is how I am making it accessible:

``````class MyTreeWidget : public QTreeWidget {
Q_OBJECT
public:
MyTreeWidget(QWidget *parent) : QTreeWidget(parent) {
setItemDelegate(new MyItemDelegate(this));
}

QTreeWidgetItem treeWidgetItemFromIndex(const QModelIndex& index) {
return itemFromIndex(index);
}
}
``````

In my `QStyledItemDelegate`, I am storing a pointer to `MyTreeWidget` and then overriding its virtual `sizeHint()` method and based on the type of the `QTreeWidgetItem` adding a padding.

``````class MyItemDelegate : public QStyledItemDelegate
{
Q_OBJECT
public:
MyItemDelegate(QObject *parent) : QStyledItemDelegate(parent) {
_myTreeWidget = dynamic_cast<MyTreeWidget*>(parent);
}

QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const {
auto treeWidgetItem = _myTreeWidget->treeWidgetItemFromIndex(index);
if (dynamic_cast<MyCustomTreeWidgetItem1*>(treeWidgetItem) {
} else if (dynamic_cast<MyCustomTreeWidgetItem2*>(treeWidgetItem) {
}

}
}
``````

This doesn’t work, since `sizeHint()` of the delegate doesn’t get called for every single `QTreeWidgetItem`.

So my text options to call `setSizeHint()` in the constructor of `MyCustomTreeWidgetItem1`, and that didn’t seem to have any effect either. Is `Qt` ignoring it because there is a delegate?

Another option was to set a minimum height of a `QWidget` that is contained in `MyCustomTreeWidgetItem` which is made possible via the `QTreeWidget::setItemWidget()`.

So it looks like the moment I use the delegate, I am confined to only size. Is my option to get rid of the delegate or there’s something else I can try?

I know many people would say switch from a `QTreeWidget` to a `QTreeView`, but it’s not possible at the moment.

## matplotlib – Vertical “broken” bar plot with arrays as bar heights and color coding

I am trying to create a bar plot that looks like this:

x axis is the number of detectors hit in coincidence (i.e. multiplicity)
for each multiplicity i have several events. The y axis contains the average pulse height of each event.The colors should correspond to the number of hits which have the shown pulse heights and appeared in events with the respective multiplicity.

I have a dictionary that has multiplicities as keys and arrays of the avarage pulse heights as values. :

``````averages = {2 : (...),
3 : (...),
4 : (...),
5 : (...),
6 : (...),}

for key in averages:
plt.bar(key,averages(key) ,width = 0.8)
``````

i only know how to produce the simple version of a bar chart that looks like this:
2

can someone tell me how to make the bars “broken to show all pulse heights and add the color coding?

## bitcoin core – Why is the data format for block height in coinbase scriptSigs inconsistent for heights 1-16?

BIP-34 claims that in coinbase transactions, the scriptSig should contain the block height. It says the format of this is “serialized CScript”, i.e. a byte indicating the length of the number (`n`), and then `n` bytes in little-endian format.

This works if you look at e.g. the most recent block as of this writing—block 640037—whose coinbase scriptSig begins with these 4 bytes: `0x0325c409`. `0x03` indicates the length, and then we have `(0x25=37 * 256^0) + (0xc4=196 * 256^1) + (0x09=9 * 256^2)`, or `37 + 50176 + 589824 = 640037`.

For obvious reasons mainnet and testnet will never need to encode heights 1-16 in their coinbase. But regtest nodes will. When I run a fresh regtest node (`v0.19.1`) and generate a couple blocks, I get coinbase scriptSigs that look like this:

``````height 1: 0x510101
height 2: 0x520101
...
height 16: 0x600101
``````

Clearly it’s not serialized CScript, at least in the format described in BIP-34. If it were, those first bytes would indicate data lengths of 81, 82, and 96 respectively, clearly ridiculous. The actual encodings of 1, 2, and 16 in serialized CScript are `0x0101`, `0x0102`, and `0x0110`. It looks to me like the format is `height+80` followed by `0x0101`. And for some reason this only persists for the first 16 blocks, as 17’s scriptSig is `0x01110101`.

I tried looking through the bitcoin source code, but I don’t write much C++ so it’s hard to tell what’s going on. No documentation—in the source (as far as I can tell) or the PR for BIP-34 or in the BIP itself seems to indicate that heights 1-16 would have a different format from every other height.

Why is this happening?

## ❓ASK – Will Ethereum Reach the same Heights as Bitcoin? | Proxies123.com

There’s a correlation between each cryptocurrency. When Bitcoin slumped, other altcoins most likely will also suffers. Sure, maybe some of altcoins are more stable than Bitcoin but the bear market will still affect them. I don’t think Ethereum will reach the same height as Bitcoin anytime soon, let alone surpass it.

## Mining Theory: BIP34, BIP66 and BIP65 should have been applied at single block heights. Why do different sources claim different block heights for the application?

Inconsistent Consensus / BIP Activation

BIP34

Activated block height 227,835 (BitMEX reference)

Activated Block Height 227,930 (Bitcoin Developer Reference)

Block height activated 227,931 (Github reference)

BIP66

Block height activated 363,724 (previous question)

Block height activated 363,725 (Github reference)

Block height activated 363,731 (BitMEX reference)

BIP65

Block height activated 388,380 (BitMEX reference)

Block height activated 388,381 (Github reference)

Confusing documentation

BIP34 says it activates when 950 out of 1000 signal blocks for Version 2. It is not clear if this includes the current block or refers to previous blocks

BIP66 says it fires when 950 of the previous 1000 blocks point to Version 3. However, the customer notes say 951 of the previous 1001 blocks. Then BIP66 says it is activated using the BIP34 protocol. We now have three possible methods. Do not match.

Any advice on what's going on here?